Electron energy deposition in the middle atmosphere

Details Electron energy deposition in the middle atmosphere Electron energy deposition in the middle atmosphere

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.6267v&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Aug. 1, 1983, p. 6267-6274.

Computer Science

Sound

58

Atmospheric Ionization, Electron Precipitation, High Energy Electrons, Middle Atmosphere, Satellite Sounding, Flux (Rate), Lyman Alpha Radiation, Satellite-Borne Instruments, Solar Radiation

Scientific paper

Spectra of locally precipitating 36- to 317-keV electrons obtained by instrumentation on the S3-2 satellite are used to calculate energy deposition profiles as a function of latitude, longitude, and altitude. In the 70- to 90-km altitude, mid-latitude ionization due to these precipitating energetic electrons can be comparable to that due to direct solar H Lyman alpha. At night, the electrons produce ionization more than an order of magnitude greater than that expected from scattered H Lyman alpha. Maximum precipitation rates in the region of the South Atlantic Anomaly are of the order of 0.01 erg/sq cm s with a spectrum of the form j(E) = 1.34 x 10 to the 5th E exp -2.27 (keV). Southern Hemisphere precipitation dominates that in the north for L = 1.1-6 except for regions of low local surface field in the Northern Hemisphere. Above L = 6, local time effects dominate, i.e., longitudinal effects due to the asymmetric magnetic field which are strong features below L = 6 disappear and are replaced by high-latitude precipitation events which are local time features.

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